Troubleshooting. ZyXEL GS1900-24, GS1900-16, GS1900-24HP, GS1900-24E, GS1900-48HP, GS1900-48, GS1900-10HP, GS1900-8HP, GS1900-8

C

HAPTER

34

Troubleshooting

This chapter offers some suggestions to solve problems you might encounter. The potential problems are divided into the following categories.

•

Power, Hardware Connections, and LEDs

•

Switch Access and Login

•

Switch Configuration

34.1 Power, Hardware Connections, and LEDs

The Switch does not turn on. None of the LEDs turn on.

1

Make sure the Switch is turned on (in DC models or if the DC power supply is connected in AC/DC models).

2

Make sure you are using the power adaptor or cord included with the Switch.

3

Make sure the power adaptor or cord is connected to the Switch and plugged in to an appropriate power source. Make sure the power source is turned on.

4

Turn the Switch off and on (in DC models or if the DC power supply is connected in AC/DC models).

5

Disconnect and re-connect the power adaptor or cord to the Switch (in AC models or if the AC power supply is connected in AC/DC models).

6

If the problem continues, contact the vendor.

One of the LEDs does not behave as expected.

1

Make sure you understand the normal behavior of the LED. See Section 3.3 on page 31

.

2

Check the hardware connections. See Chapter 2 on page 20 .

3

Inspect your cables for damage. Contact the vendor to replace any damaged cables.

4

Turn the Switch off and on (in DC models or if the DC power supply is connected in AC/DC models).

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5

Disconnect and re-connect the power adaptor or cord to the Switch (in AC models or if the AC power supply is connected in AC/DC models).

6

If the problem continues, contact the vendor.

34.2 Switch Access and Login

I forgot the IP address for the Switch.

1

The default in-band IP address is 192.168.1.1.

2

If this does not work, you have to reset the device to its factory defaults. See Section 3.4 on page 32 or

Section 33.6 on page 228 .

I forgot the username and/or password.

1

The default username is admin and the default password is 1234.

2

If this does not work, you have to reset the device to its factory defaults. See Section 3.4 on page 32 or

Section 33.6 on page 228 .

I cannot see or access the Login screen in the web configurator.

1

Make sure you are using the correct IP address.

• The default in-band IP address is 192.168.1.1.

• If you changed the IP address, use the new IP address.

• If you changed the IP address and have forgotten it, see the troubleshooting suggestions for I forgot the IP address for the Switch.

2

Check the hardware connections, and make sure the LEDs are behaving as expected. See

Chapter 2 on page 20

.

3

Make sure your Internet browser does not block pop-up windows and has JavaScripts and Java enabled.

4

Make sure your computer is in the same subnet as the Switch. (If you know that there are routers between your computer and the Switch, skip this step.)

5

Reset the device to its factory defaults, and try to access the Switch with the default IP address. See

Section 3.4 on page 32

or Section 33.6 on page 228

.

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6

If the problem continues, contact the vendor, or try one of the advanced suggestions.

Advanced Suggestions

• Try to access the Switch using another service, such as HTTPS. If you can access the Switch, check the remote management settings to find out why the Switch does not respond to HTTP.

I can see the Login screen, but I cannot log in to the Switch.

1

Make sure you have entered the user name and password correctly. The default user name is admin, and the default password is 1234. These fields are case-sensitive, so make sure [Caps Lock] is not on.

2

Check that you have enabled logins for HTTP. If you have configured a secured client IP address, your computer’s IP address must match it. Refer to the chapter on access control for details.

3

Disconnect and re-connect the cord to the Switch.

4

If this does not work, you have to reset the device to its factory defaults. See Section 3.4 on page 32 or

Section 33.6 on page 228 .

Pop-up Windows, JavaScripts and Java Permissions

In order to use the web configurator you need to allow:

• Web browser pop-up windows from your device.

• JavaScripts (enabled by default).

• Java permissions (enabled by default).

34.3 Switch Configuration

I lost my configuration settings after I restart the Switch.

Make sure you save your configuration into the Switch’s nonvolatile memory each time you make changes. Click

Save at the top right corner of the web configurator to save the configuration permanently. See also

Section 5.3.1 on page 38

for more information about how to save your configuration.

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